Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine provides exceptional tuning stability and smooth, precise operation. Engineered with a refined 1:18 gear ratio, this closed-type tuning machine ensures velvety-smooth adjustments and highly accurate pitch calibration for solid and slotted headstocks.
Every component is precision CNC-machined, surface-finished, and permanently lubricated with proprietary Schaller grease for completely maintenance-free performance. High-grade brass string posts are meticulously fitted into the housing, offering robust wear resistance and dependable tuning retention under continuous playing tension.
Equipped with the innovative stepped M6 flanged washer, this machine reliably centers the string post without requiring stepped headstock drilling. This design eliminates tilting torque and reduces mechanical stress on both the string post and rear fixing screws, matching the exact installation dimensions of its predecessor for seamless retrofitting.
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Borehole | 0.17 in diameter with 0.14 in drive surface |
| Weight (Small/Large Button) | Metal: 1.27 oz / 1.34 oz, Perloid: 1.06 oz / 1.09 oz, Ebony: 1.06 oz / 1.09 oz (including hollow screw) |
| Product Weight | 0.79 lb |
